Carp are freshwater species of the family Cyprinidae. Carp have long been an important food fish to humans, as well as popular ornamental fishes such as the various goldfish breeds and the domesticated common carp variety known as koi.
Goldfish Koi

Goldfish are popular pond fish.A relatively small member of the carp family (which also includes the koi carp and the crucian carp), the goldfish is a domesticated version of a less-colorful carp (Carassius auratus) native to east Asia.

Koi, As A Carp Fish Animal

Ornamental domesticated varieties of the common carp.The word koi comes from Japanese, and means "carp".It includes both the dull grey fish and the brightly colored varieties.

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